• 대한수의사회지
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• 제15권5호
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• pp.255-257
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• 1979

The blood picture of 3 lions (two males and one female), aging from 2 to 5 months old and raising at Yongin Farm Land, was observed. The results obtained in this work were summerized as follows: 1. Erythrocytic blood picture: Number of erythrocyte $8

• Animal Bioscience
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• 제35권5호
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• pp.639-647
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• 2022

Objective: This study was conducted to clone and compare the molecular characteristics of the deiodinase 2 (DIO2) gene between Sichuan White geese and Landes geese, and to analyze the association between polymorphisms of the DIO2 gene and head dimensions in Tianfu meat geese. Methods: The coding sequence of the DIO2 gene was cloned by polymerase chain reaction and vector ligation and aligned by DNAMAN software. A total of 350 Tianfu meat geese were used to genotype the polymorphisms of the DIO2 gene and measure the head dimensions. Association analysis between the polymorphisms of the DIO2 gene and head dimensions was carried out. Results: An 840-bp coding sequence of the DIO2 gene was obtained and comparison analysis identified four polymorphic loci between Sichuan White geese and Landes geese. Further analysis showed that the dominant alleles for the four polymorphic loci were G, G, A, and T and the frequency of the heterozygous genotype was higher than that of the homozygous genotype in Tianfu meat geese. Compared to that in the population of non-knob geese of Tianfu meat geese, the head dimensions in the population of knob geese were significantly higher except for nostril height. However, in the non-knob geese, beak width 1, beak width 2, nostril length, cranial width 1, and maxillary length had significant differences among different genotypes or haplotypes/diplotypes. Conclusion: These results suggested that polymorphisms of the DIO2 gene could be considered molecular markers to select larger heads of geese in the population of non-knob geese.

• Animal Bioscience
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• 제36권1호
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• pp.29-42
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• 2023

Objective: Pigs, an ideal biomedical model for human diseases, suffer from about 50% early embryonic and fetal death, a major cause of fertility loss worldwide. However, identifying the causal variant remains a huge challenge. This study aimed to detect single nucleotide polymorphisms (SNPs) and candidate genes for the number of mummified (NM) piglets using the imputed whole-genome sequence (WGS) and validate the potential candidate genes. Methods: The imputed WGS was introduced from genotyping-by-sequencing (GBS) using a multi-breed reference population. We performed genome-wide association studies (GWAS) for NM piglets at birth from a Landrace pig populatiGWAS peak located on SSC11: 0.10 to 7.11 Mbp (Top SNP, SSC11:1,889,658 bp; p = 9.98E-13) was identified in cyclin dependent kinase on. A total of 300 Landrace pigs were genotyped by GBS. The whole-genome variants were imputed, and 4,252,858 SNPs were obtained. Various molecular experiments were conducted to determine how the genes affected NM in pigs. Results: A strong GWAS peak located on SSC11: 0.10 to 7.11 Mbp (Top SNP, SSC11:1,889,658 bp; p = 9.98E-13) was identified in cyclin dependent kinase 8 (CDK8) gene, which plays a crucial role in embryonic retardation and lethality. Based on the molecular experiments, we found that Y-box binding protein 1 (YBX1) was a crucial transcription factor for CDK8, which mediated the effect of CDK8 in the proliferation of porcine ovarian granulosa cells via transforming growth factor beta/small mother against decapentaplegic signaling pathway, and, as a consequence, affected embryo quality, indicating that this pathway may be contributing to mummified fetal in pigs. Conclusion: A powerful imputation-based association study was performed to identify genes associated with NM in pigs. CDK8 was suggested as a functional gene for the proliferation of porcine ovarian granulosa cells, but further studies are required to determine causative mutations and the effect of loci on NM in pigs.

• 한국임상수의학회지
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• 제34권3호
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• pp.222-224
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• 2017

A retrospective study was designed to determine whether there were any differences in prepartal blood biochemical parameters between cows developed subclinical ketosis (SCK) and non-SCK cows. Data on blood biochemistry from 33 Holstein parturient cows (15 SCK and 18 non-SCK cows) in one farm for one year, were compared. Plasma beta-hydroxybutyrate, non-esterified fatty acid and glucose concentrations were utilized in the diagnosis of SCK and showed significant differences between SCK and non-SCK cows after calving. Before calving, however, only plasma total cholesterol concentration in SCK cows was significantly lower than that in non-SCK cows. Consequently, it seems that lower plasma total cholesterol concentration before calving is related to the occurrence of SCK immediately after calving.

• Asian-Australasian Journal of Animal Sciences
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• 제16권9호
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• pp.1390-1396
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• 2003

This research investigates the use of crossbreed cattle (Red Sindhi${\times}$Yellow Local cattle) at household level in the lowland and mountainous zones in Quang Ngai province, Vietnam. The internal and external inputs and outputs of mixed farming systems were analysed to quantify the productivity and efficiency of the use of the crossbred and yellow local cattle. In the mountainous zone, households with crossbred cattle had a lower crop and farm efficiency rate than households without crossbred cattle, but in terms of crop, livestock and farm productivity they did not differ. In the lowland zone, households with crossbred cattle had a higher crop, livestock and farm productivity and crop efficiency rate than households without crossbred cattle, but did not differ in terms of farm efficiency rate. The lowland zone had higher off-farm income, crop and household productivity, but lower livestock productivity, livestock and farm efficiency rate than the mountainous zone. Households with crossbred cattle had lower off-farm income than households without crossbred cattle. The results suggest that interactions between zone and kind of household occur at the households and show that the yellow local cattle is a better breed in the mountainous zone and more or less comparable with crossbred cattle in the lowland zone. The extrapolation of the use of crossbred cattle should be carefully considered in line with feeding practice and management.

• 한국초지조사료학회지
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• 제31권1호
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• pp.9-14
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• 2011

본 시험은 이탈리안 라이그라스 극조생종 품종을 육성하기 위하여 2001년부터 2010년까지 국립축산과학원 초지사료과에서 수행되었다. 이탈리안 라이그라스 신품종 '그린팜'는 2배체 품종으로서 엽은 녹색이며, 월동 전 초형은 직립형이고, 봄의 초형은 반직립형이다. 또한 '그린팜'는 4월 28일경에 출수하는 극조생종 품종으로 '그린팜'은 'Florida 80' 보다 지엽폭이 0.4mm 넓고, 지엽의 길이가 0.8 cm 길었으며, 출수기에 초장은 93 cm로 'Florida 80' 보다 5 cm 정도 작았다. 줄기의 두께는 'Florida 80' 보다 0.6 mm 굵고 이삭길이는 0.3 cm 짧았으며, '그린팜'의 내한성은 'Florida 80' 보다 다소 강한 품종이었다. '그린팜'의 건물수량은 11,790 kg/ha로서 'Florida 80'과 대등하였다. '그린팜'의 사료가치는 in vitro 소화율이 68.7%, 가소화양분총량(TDN)이 63.3%로서 'Florida 80' 보다 각각 1.9, 1.7% 높았고, 산성세제불용섬유(ADF)와 중성세제불용섬유(NDF)는 32.5 및 54.6%로 'Florida 80' 보다 각각 2.2 및 4.3% 낮았다.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1993년도 Proceedings of International Conference for Agricultural Machinery and Process Engineering
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• pp.591-600
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• 1993

Considerable controversy exists about the trend of animal traction effects on crop production in dryland farming systems in sub-Saharan Africa (SSA). This problem arises on account of the failure of the few available empirical studies to recognise the important of technological experience of the individual adopting farmers. This study hence addresses this issue by examining the effects of experience in animal traction technology (ATT) on farm size, cropping emphasis, total crop output and farm productivity. It is based on farm management survey data on 42 small holder farm households fro Ghana. Thirty of these households used animal traction technology (ATT) fro crop cultivation and the rest, mainly hand-hoe. The animal traction sub-sample is classified into three groups according to farmers' years of experience with the technology , thus , those with 1-2, 3-10, and more than 10. Evidence from the study shows that the progression of years of experience with ATT leads to inten ification of labour and land use systems, enhancement of degree of motivation to enter into the market economy, increases in total crop output and farm productivity resulting for decreases in cultivated acreages. The implication of the findings is that institutioal and technical support that do accompany the introduction of such technologies should be structured to last for a relatively longer period to accomodate the learning process.

• Animal Bioscience
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• 제37권6호
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• pp.965-981
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• 2024

Objective: Milk composition varies considerably and depends on paratypical, genetic, and epigenetic factors. MiRNAs belong to the class of small non-coding RNAs; they are one of the key tools of epigenetic control because of their ability to regulate gene expression at the post-transcriptional level. We compared the relative expression levels of miR-106b, miR-191, and miR-30d in milk to demonstrate the relationship between the content of these miRNAs with protein and fat components of milk in Holstein and Ayrshire cattle. Methods: Milk fat, protein, and casein contents were determined in the obtained samples, as well as the content of the main fatty acids (g/100 g milk), including: saturated acids, such as myristic (C14:0), palmitic (C16:0), and stearic (C18:0) acids; monounsaturated acids, including oleic (C18:1) acid; as well as long-, medium- and short-chain, polyunsaturated, and trans fatty acids. Real-time stem-loop one-tube reverse transcription polymerase chain reaction with TaqMan probes was used to measure the miRNA expression levels. Results: The miRNA expression levels in milk samples were found to be decreased in the first two months in Holstein breed, and in the first four months in Ayrshire breed. Correlation analysis did not reveal any dependence between changes in the expression level of miRNA and milk fat content, but showed a multidirectional relationship with individual milk fatty acids. Positive associations between the expression levels of miR-106b and miR-30d and protein and casein content were found in the Ayrshire breed. Receiver operating characteristic curve analysis showed that miR-106b and miR-30d expression levels can cause changes in fatty acid and protein composition of milk in Ayrshire cows, whereas miR-106b expression level determines the fatty acid composition in Holsteins. Conclusion: The data obtained in this study showed that miR-106b, miR-191, and miR-30d expression levels in milk samples have peculiarities associated with breed affiliation and the lactation period.

• Journal of Veterinary Science
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• 제24권3호
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• pp.45.1-45.6
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• 2023

Bovine spastic paresis (BSP) is a neuromuscular disorder characterized by hypertension and stiffness of hindlimb. Two Korean native cattle (Hanwoo) calves developed BSP or BSP-like symptoms, and a tenotomy of superficial tendon of medial head and deep tendon of lateral head of gastrocnemius muscle was performed for treatment. A cast was applied postoperatively to prevent muscle rupture and was removed three weeks later. The prognosis was evaluated at 3 weeks, 6 and 18 months postoperatively. Neither calf showed any other postoperative sequelae. This is the first case study to report the diagnosis, treatment, and prognosis of BSP in Hanwoo.

• 한국가금학회지
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• 제50권2호
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• pp.81-90
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• 2023

국내의 동물복지 개념의 도입은 해외 선진국에 비해 늦었으나 정부 주도에 의해 비교적 적극적인 동물복지정책들이 도입되고 있다. 그러나 축산업 현장에서 동물복지 인식이 충분치 못하기 때문에 자발적인 개선이 아닌 정부의 정책수단에 의하여 동물복지를 추진하고 있는 실정이다. 본 연구에서는 국내 산란계 농가를 중심으로 최근 5년간 도입된 동물복지 관련 정책이 현장에서 유발하는 갈등을 유형화하여 파악하기 위하여 산란 농장 운영자들의 동물복지 관련 의식수준 및 동물복지 관련 규정 준수여부를 조사하였다. 산란 농가 현장방문을 통하여 설문조사를 진행하였으며, 산란양계농장 운영자(소유자 혹은 관리 책임자)를 대상으로 53가구의 산란양계 농가를 조사하였다(2020년 산란양계농가 수 797가구 수 기준 90% 신뢰수준(Z-score: 1.65) 10.18% 허용 오차). 현장에서의 갈등을 윤리적 고려 수준에 따라 소극적, 중도적, 적극적 3가지로 유형화하였다. 또한 윤리적 고려 수준에 따라 동물복지 관련 규정 준수 여부와의 상관관계를 조사하였다. 결과적으로, 축산 현장에서의 동물복지 관련 규정 준수 여부는 축산 농장 운영자의 윤리적 고려수준의 영향을 받는 것을 확인할 수 있었다. 다만 예외적으로 농장 운영자의 동물복지 의식수준이 높음에도 동물복지 관련 규정은 준수하지 못하는 갈등상황이 확인되었는데, 이는 현장에서 인지하고 있는 규정과 정책의 충돌로 인해 발생한 갈등 상황임을 확인할 수 있었다. 이처럼 정책 수단에 의해 추진되는 동물복지가 효과적일 수는 있지만, 아직은 현장에서 갈등을 유발하고 있음을 확인할 수 있었다.